I bought a book off Amazon.com called Rainbow boas and other neotropical boas and to tell you the truth it was stuff i already knew found out online. that carsheet by nerd is really good. I have a rainbow and they are actually really easy to care for. just need lots of water and humidity. mine is really nice and never ever tried to bite which i guess in unusual for rainbows.
if you have any questions i will try my best to answer.